The History Of Wireless World
After an era of cables and wiring for networking and data exchange between PCs, it was time that computer developers came up with something more feasible and convenient. Garnering basic inspiration from radio signal transmission that revolutionised wireless communication, transmission of wireless data started from infrared communication. ?From ?humble beginnings of only a few bits per second in only select state of the art technology laboratories of its time in the early 1980s, it has now become one of the fastest and safest modes of communication. Today anything measured below megabits per second is considered slow and even in technologically backward countries like Nepal, speed of a few hundred kilobytes can be obtained. The upper limit is also constantly being challenged and is now set at a whopping 500 megabytes per second achieved in January 2010 in Siemens labs. Some of the popular and beneficial modes of wireless communication in the computer industry are as follows.?Infrared
From night vision to thermal imaging, remote sensing and tracking, infrared prospered in the field of wireless communication as well. In the early years, infrared wireless communication was a huge sensation. Known as IR, this technology is based on the principal of harnessing energy of electromagnetic waves to send and receive data and relies on infrared LEDs which is?polarized?using a narrow modulated plastic beam. Infrared is commonly found in mobile phones for sharing contacts, images and other media objects. PCs with IR wireless installed in them can use this feature as well.?
Pros: Cheap,?
Cons: Short range (requires line of sight) less bandwidth.
Bluetooth
Pros: Low power consumption, compact
Cons: Low range, low transfer speed.?
Mobile Communications (3G/GPRS/CDMA)
Source : The Kathmandu Post
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Source: http://www.gulmiresunga.com/2012/11/the-history-of-wireless-world.html
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